Surface condensing apparatus.



H. KELLER. SURFACE GONDENSING APPARATUS. APPLIUATION FILED JLY 15, 1909.

1,063,695, Patented Junes, 1913.A

Mtnesses: 'l' l'r'lvehtor';

' H uldreich v Kel' lecunimo speedline rA'rEN'r orrrcii. i

i i nUEnnErcE KELLER, oF aumen, SWITZERLAND, Assieme ro eENEBfALELECTRIC COMPANY, ri coRroEATIoN or NEW Yonx.

. screenen oormzsnsme 2P-Annees.

Specioation of Letters Patent.

Patented J une 3, 1913.

y Application md July 15,1909. Serin No. 507,684.

rEhe presentinvention relates to surface condensing systems forcondensing the eX- l@ haust steam from a. turbine or other prime rnover.Such a system requires a pump to remove the air contained in the steamto he condensed' if the best ee'cts are vto be obtained. The type ofpump known es :i lo centrifugal throwing pump has many edvonteges forsuch yinstallations but there are certain conditions under which itoperates et a. disadvantage. I mean by a cent-rifugal throwing puznp onein which Water or 2G seine other medium heavier than air is dischargedby an impeller and in so doing acts to compress nir or other gos. vl thepump A is so situated that the throwing Water een freely iiow iroin the'pu-nip after performing its Work no diiiiculty is experienced. @n theother hand if the pump is located in e deep condenser pit from which thethrowing Water cannot freely flow, a specielrotary pump has been used toreinoveseid Water. 3G The use of such e. pump is objectionable onaccount of initial cost and that ofineintenance end. operation. Toobviate the use of the said special rotary pump7 the air pump has beenarranged to receive its supply of throwing water from e. receptaclelocated et a somewhat lower point than the pump into which the pumpdischarges, the e being used over and over agein. This rangement isdefective for the reason that the Water soon becomes heated due to theaction of the throwing pump unless the receptacle is unduly7 large. Insome 'ceses such lreceptacles cannot be used et all owing to the lackroc-rn. ln any event in a modernte size instellatibn the mere radiationand conduction of heat is insuliicient to keep the temperature es low asit should be. @Wing tothe heating of said Water hy the pump the vacuumis impaired to. the detriment of the 59 economy of the machinedischarging into vthe condenser.

l have invented or discovered an errangement whereby tironing nir pumpseen be effectively employed either With or Without Y .55 small vesselsinto which said pumps con disclaims appended thereto.

charge fftheir throwing water, and this with;

out the use of special rot-ary p'uinps serving only as a. means forhandling the throwing Water after it has performed its Work on the i onehand or unduly increasing the tempereture of the throwing Water or usinglarge vessels on the other. I, may, for exemple, use on've forni of theinvent-ion inthose iustallations where space is et .a premium, and theother form having the vessel Where space 1e less valuable. The use of evessel'as l arrange it has certain advantages that will appear morefullyhereinafter. The funda-- 'mental idee involved in my invention is toprovide an abundant supply oit' cool Water vfor the throwing pump7 atthe same time overcoming the objections above noted.

For afconsideration o f what I believe to be 'novel and my invention,attention is di rected to the accompanying description and ln theeccompenyingdin rings which are illustra-tive of my invention, Figure lillustrates a condensing system wherein `the circuleting Water conduitsystem and the throwing pump are connected in parallel as regards thewater supply, and Flgf is on arrengem'entsirniler to that shown in Fig.l, except that an equelizing vessel is interposed between the throwingpump and the source of Water supply.

l indicates a surface condenser of any usuel or suitable type to whichthe steam to he condensed is admitted by the conduit 2. rlhe interior ofthe condenser is provided With tubes or passages 3 over which the steamto be condensed posses und through which the cooling or condensingWetercirculates. The circulation of cooling ne through the condenser ismaintained hy the circulating pump 4, inlet 5 and outlet (S. The coolingwater is supplied to the purnp by the pipe 'T which muy he connected ton cooling tower, reservoir or other sourceoi Water supply. i

' S indicates the centrifugal throwing pump for removing from thecondenser'. The pump reeeivesits throwing Waiter from the pipe 9 that isconnected to the pipe 7 lend` ing from the supply of circulating waiter..ln the pipe '9 is a. valve or other device 10 for restricting or'regulating the passage of Water to the suction side of the pumpx.

Thev air to be removed from the condenser\ lovvs by the pipe l1 to thethrowing pugp Hoop S wherein it is acted upon by the water dis.- chargedby the pump. From the pump the mixture passes. by theconduit 12 into ajet device or constriction 13 in the pipe leading to the 'suction sideof the circulating pump. The use of this jet. device. or restrictionarranged as shown enables the circulating pum to draw off the throwingWat-er without t ie use of a special rotary pump. In the pipe 12 isplaced a check valve 14 to prevent.

water from the centrifugal circulating pump lor its source of supplyfrom flowing backward to the throwing pump. The circulatingr pump andthe throwing pump may be driven by any suitable means such as a turbineor electric motor. I have elected to show each driven by an electricmotor 15.

It will be noted that a continuo-us circulation of Water from the pipe 7is maintained through the throwing pump instead of using the same waterover and over again, Which operation would dually heat the water. Theamount ot` v:..,er which passes through the throwing pump considerablyless than that which passethrough the circulating pump so that only arelatively small amount o t' heat :vided to the water due to its passagethrough the throwing pump and this amount has but a small eitect uponthe main body of the circulating Water flowing through the condenser.'lhe water used for cooling the condenser' is discharged back to thesource ot supply or otherwise, as desired. This niea'ns then that thewater available ter use in the "hrowing pump has a temperatur-:i whirlis not greater than that emiiiloyed 'tor circulating purposes; also thatthc use ai' an auxiliary vessel or receptacle is avoided, which reducesthe necessary space occupied by the apparatus and also avoids the use ota special pump for conveying the discharged water from the throwingpump' when the latter is so positioued that its discharge cannot flowfreely away.

In Fig. 2, a nioditied `arrangement is shown wherein a relatively smallvessel is interposed between the source ot cooling Water and the.throwing pump. Circulating water entersl they pump lfrom the pipe 7 asbefore, a valve 1u being' employed to regulate its passage. .t ceitamount of water from the pipe AT is dis u: 'ged into the collecting oreipializing vessel or reservoir 18 by the pipe 'la under the control ofthe valve 20. The water in the vessel 18 will be cooled to a greater orless extent due to radiation and conduction. The throwing pump insteadof receiving its supply of throwing water directly t'rom. the supplypipe T receives it therel"om-tl1rough the vessel 18 and a pipe 21, Whoselower end is submerged in the vessel and is' provided with a 'strainerThe air is conveyed from the'coudenser l'y the pipell and iS dischargedwith the throwing water by the conduit 23 into the vessel-,18 in whichthe yair is liberated instead offbeing conveyed with the circulatingWater through the tubes of the condenser. The amount of Water that iscontained in the vessel is subjected to the control of a float 24 whichis connected y by an upright rod withthe lever 25 of a valve 26. Thisvalve regulates the passage of 'Water from the vessel through the Ipipe27 linto the circulating pump 4. The valve 16 orother; device soregulates the size of'.

duction in pressure beyond the valve 16 due to its throttling actionalso assists in drawing water through the pipe 27. It lis to be'.

observed in this case as in the one previ. ously described, that thecooling Water con- .duit s stem and the 'mm3 8 are connected in parallelas regards the'passage of Water, hence the advantages set forth inconnection with Fig. 1 apply to the arrangement of this figure.` Thisarrangement also has the advantage that the air which is extracted fromthe vapor space in the condenser is liberated at an intermediate pointinstead` of being conveyed with the circulating Water through the pump 4Where Eit might interfere with its suction.

In accordance With the provisions ofthe patent statutes, I havedescribed the principle of 4Qperat-ion of my invention, together wlththe apparatus which I now consider to represent the best embodimentthereof; but I desire to have it understood that t-he apparatus shown isonly illustrative, and that the invention can be carried out by otherlmeans.

lVhat I claim as new and desire to secure by Letters Patent of the'United States, is,-

1. In a condensing system, the combinib. tion of a surface condenserhaving tubes and a steam inlet, a conduit and a pump for circulating afluid through said tubes for condensing the vapor within the condenser,and

an air pump of the throwing type for removin air from the vapor space ofthe. condenser, both of said pumps receiving fluid from the same source,and Huid discharged from both pumps passing through the said tubes. v 2.In a condensing system, the combination of a surface condenserhavingtubes and a steam inlet, a pump for circulating a condensing fluidthrough the tubes, a centrifugal throwing pump for removing air from thevapor'space of the condenser, a conduit izs that is common to andHsupplies Huid to both pumps, and a conduit that receives fluid from bothpumps and discharges it into the 'tubes to condense the vapor vin saidconcirculating pump, and discharging it into the conduit system on thesuction side of said circulating pump. l

4. In a condensing system, the combina tion of a surface condenser, apump for circulating condensing water through the con denser, acentrifugal throwin 4pump which is piped to the vapor space o thecondenser to remove air therefrom, means supplying water to the throwingpump from the source of supply of the circulating pump, and means forconveying Huid discharged from the throwing pump to the suction 'side ofthe circulating pump, the throwing pump being. connected in parallelwith the supply to the circulating pump as regards the passage of watertherethrough.

5. In a condenser system, the combination i of a surface. condenser, apump,l for circulat-` mg condensing Water through it, a centrifugal`throwing pump `which is piped lto the vapor space of the condenser toremove air therefrom7 means for supplying water to the' throwing pumpfrom the source of supply of the circulating p ump, means for conveyingfluid discharged from the throwing pump to the suction side of thecirculating pump, the throwing pump being connected in parallel with thesupply to the circulating pump as regards the passage of watertherethrough, and means lfor regulating the passage of fluid through thepumps.

6. In a condensing system, the combina'- tion of a condenser, acentrifugal pump for circulating water through the condenser, a

Acentrifugal throwing air pump for removing air and vapor from thecondenser a reservoir, conduit means supplying -water to the circulatingpump and .thev reservoir, a conduit between the reservoir andthe waterinlet of the throwing pump, a conduit conveying the discharge from thethrowing pump to the reservoir, a conduit .for conveying'-vva-`55 terfrom the reservoir to the inlet side of the circulating pum and a 4floatcontrolled valve for regulating the flow of water from thereservoir tothe last named conduit.

Inwitness-Whereof, I have hereunto set my hand 16th day of June, 1909.v

y l. .HULDREICH KELLER.

' Wtnesse'sz i y Y i HEINRICH BoLTsHAUsEn, U"yCARnGUiiLER.

tupicw of thisgatent s.: @tained for 'tive cents each, by addressing thei'scommissioner ot Patenti,

' Washington, I).I G." i

